How can I increase milk production and help my baby re-learn a proper latch?

Christiana asks:My 7-week-old son has reverted back to tongue thrusting while nursing. It's proving to be quite painful and I'm using a nipple shield again. Is there anything else I can do to help him to re-learn a proper latch? Also, how can I increase my milk production to help me increase my supply for pumping for when I return to work? What are the hours of your warm line? Thanks!Debi